015-1 Wyo. Code R. § 1-4
In computing any period of time prescribed or allowed by these rules, the day of the act, event, or default from which the designated period of time begins to run shall not be included. The last day of the period so computed shall be included, unless it is a Saturday, a Sunday, or a legal holiday, in which event the period runs until the end of the next day which is not a Saturday, a Sunday, or a legal holiday. As used in this rule, "legal holiday" includes New Year's Day, Washington's Birthday, Memorial Day, independence Day, Labor Day, Martin Luther King, Jr., Wyoming Equality Day, Veterans Day, Thanksgiving Day, Christmas Day, and any other day appointed as a holiday by the President or the Congress of the United States, or by the governor or the legislature of the State of Wyoming.
015-1 Wyo. Code R. § 1-4